Winmail.dat, MSG, MHT Viewer

Name: Winmail.dat, MSG, MHT Viewer
Rating: 3.9829788 (17659 reviews)
Author: Letter Opener GmbH

Letter Opener GmbH

★ 4.0 (17,659 ratings)

⬇ 1,000,000+ downloads

Est. actual: 1,034,405

Free

Released: Jan 14, 2020

No in-app purchases

No ads

Signals

4 this week · 1 positive · 1 warning All of this week's signals →

📈Last 7 days +3.7K installs — 12% slower than the week before (+4.3K) · 434/day since Oct 7
🏆Among Productivity apps top 2% by installs gained this week (794 peers growing)
⭐Rating steady at ★ 3.98 since Oct 7
🛠Updates quiet · updated 72 days ago

Installs since launch

+13,895 installs · +177 ratings since Oct 7

Update history

3.4.0 Aug 31, 2026 · seen Oct 18, 2026

Initial Release 🎉

Only the current version so far — new entries appear as the app ships updates.

Winmail.dat, MSG, MHT Viewer is a productivity app by Letter Opener GmbH with 1,000,000+ downloads (about 1M estimated). +3.7K installs in the last 7 days. Rated 4.0 from 18K ratings. Released Jan 14, 2020. Install growth, rank history, SDKs and ad networks.

From the store listing: “Letter Opener - Open Winmail.dat, MSG, EML and MHT files.”